Do you remeber the sure grip posi units of the early 60's mopar days? Or eve seen the rear end of a 93+ CAMARO?

What the object is to do is try to keep the spydergears from spinning. So you add some type of clutch friction material between the spydergear and carrier then add a type of spring asy to force the gear to the friction material. this way the gear can turn if forced to but will resist movement under operation. This is how the suregrip was assembled. Do a search on "sure-grip" or "mopar posi" to get a diagram.


Now since our carrier doesnt have room to place clutch type plates between the spydergears and carrier, what is done in the retrofit is to take the spring assy between the spydergears and add friction material to that. Now the gears must turn when the friction material is pushing against them. the reason the spring assy doesnt spin is because the diff pin goes right through it and forces it to move with the carrier.

Terry